Transmission for diaphragm pump

ABSTRACT

An electric motive means operates through a transmission to drive a conventional diaphragm pump. The transmission includes a flywheel as a mass to assist through a cam the function of driving the diaphragm pump.

United States Patent Wagner [4 1 Apr. 25, 1972 [s41 TRANSMISSION FOR DIAPHRAGM 1,661,661 3/1928 UMP 2,188,035 H1940 2,654,256 /1953 McKechnie...

[72] inventor: Josef Wagner, 7991 Friedrichshafen- 2,853,015 9/1958 Pleuger .417/439 Fischbach, Germany 3,359,809 12/1967 Spender ...74/55 Filed: Feb 3, 1970 3,529,480 9/1970 Kaspareck ..74/55 2 App], N 3,166 Primary Examiner-Meyer Perlin 7 Assistant Examiner-Wes1ey S. Ratliff, Jr. 7

Attorney-William Frederick Werner, Eric P. Schellin and Foreign Application Priority Data Martin p H ff Feb. 6, 1969 Germany ..P 19 05 838.9 ABSTRACT [52] US. Cl ..74/55 An electric motive means operates through a transmission to [51] Int.Cl. ..Fl6h 25/08 drive a conventional diaphragm pump. The transmission in- {58} Field of Search ..74/55, 60; 417/21 1, 269, 439 cludes a flywheel as a mass to assist through a cam the function of driving the diaphragm pump. [56] Refeunces Cl ed 3 Claims, 1 Drawing Figure UNITED STATES PATENTS 307,859 11/1884 Due .Q. ..74/55 2 n 3 I0 1 3L I )l i\ e s Patented .Apri-l 25, 1972 lnren for- T056 F WRGNE R v ATTQKNEY. I weemmwwmw TRANSMISSION FOR DIAPHRAGM PUMP defines a space into which axle 7 protrudes and terminates in aced relationship from the left s shown. A cylindrical flywheel 8 of considerable mass is suitably keyed to axle 7. It will be seen from the drawing that for utilization in what is known as an airless pistol for application of a coating material, such as paint, diaphragm pumps have been used. A diaphragm pump provides a smooth flowing source of pressurized paint or the like which cannot be as easily achieved with the utilization of a reciprocating piston type pump unless a plurality of cylinders and pistons are used. A diaphragm pump also possesses the further advantage that when the pistol of the spray device is in an off position, that is the valve therefor is closed, the pumped material is returned to its sump so that the diaphragm pump is operated in a continuous manner.

In other words, in the airless pistol paint application methods, the pistol really comprises a unique valve arrangement for turning on and oft" the pistol in order to start and stop the application of the sprayed material.

A diaphragm pump operates, of course, with a flexible disc whose surface moves in a reciprocating manner so that the diaphragm in its suction position is cone-shaped and in its exhausted condition is flat or vice versa. The diaphragm pump includes a housing with sufficient volume of space to accommodate the diaphragm in the position outlined. The flexing of the diaphragm is accomplished by an elongated longitudinal rod which may be connected to the apex portion of the diaphragm and has its other end connected to drive means which operates thereon to reciprocate the rod thereby flexing the diaphragm in a to and fro manner. Of course, recent innovations include the concept of employing no direct connection between the rod and the diaphragm. The rod in such an innovation operates as a piston and the diaphragm is flexed by oil pressure in one direction and a spring to urge the rod/piston towards-the operating means.

The present invention is not particularly concerned with the structure of the diaphragm pump per se but is concerned with the ingenious means for accomplishing application of kinetic energy to one end of the mentioned reciprocating rod and the housing therefor.

BRIEF DESCRIPTION OF THE INVENTION It is within the purview of the instant invention to provide a unique transmission means between the electromotive means of relatively low torque output and a diaphragm pump. Within this concept is a cam means positioned on the forward recessed face of a cylindrical flywheel. The said flywheel is keyed to an elongation of the axle of the electromotive means. in order to protect the flywheel driving means and the rod which is in abutment with the said cam, the diaphragm pump and its corresponding transmission means is located in a single housing which is attached to the electromotive means to provide a dust free unitary arrangement. The invention may be relatively inexpensively constructed.

DETAILED DESCRIPTION OF THE INVENTION The FIGURE presented in the instant matter is a side elevation in partial crosssection to show the specific inventive features of the present invention.

Reference numeral 1 represents a cylindrically shaped extension housing for the axle of an electric motor 2 which protrudes therefrom. It will be seen that the extension housing I includes concentrically therein journalling means for the protruding axle 7 which extends through the center of the left wall thereof, as shown. Reference numeral 3 refers to a-cylindrically shaped housing 3, which is open at one end, has this end portion in mating relationship with one end of extension housing 1. Housing 3 is suitably affixed to extension housing 1 as can be seen from the annular shoulder provided near the outer peripheral portion of extension housing 1. Housing 3 the flywheel, has a diameter slightly less than the internal diameter of housing 3 so that it is in spaced relationship therewith. Additionally, the flywheel 8 is sufficiently elongated so that the peripheral portions: thereof extend towards the left wall of housing 3 and the outer left wall of extension housing 1 but is in spaced relationship with the said walls. The flywheel 8 is provided at its right side: thereof with an annular concentric recess 9. Rod bearings 10 are positioned in recess 9 y to provide journalling between the left outer wall of extension housing 1 and the bottom of the said annular concentric recess 9. Suitable races are provided. The journalling means as stated has an important function in the operation of the transmission means of the instant invention. Without the journalling means the flywheel would merely be supported at its keyed axle so that as thrust was being applied to the rod 6 through the cam a vibratory swing motion would be imparted to the flywheel. By providing the journalling means the flywheel cannot pivot along an axis normal to the axle 7.

A large recess 11 is located at the left side of the flywheel 8, as shown. A disc cam 5 is located within the recess. The forwardly extending flat surface thereof is in abutment with the rounded end portion of the right side of rod 6. Cam 5 being eccentrically mounted within recess 11 is .able to provide reciprocating motion to rod 6 as the cam turns and as the flywheel turns which carries the said cam.

While in the above left and right directions have been asserted, it will be appreciated that this terminology has been employed merely for providing proper elucidation to the present invention with regard to the drawing provided.

While there have been shown and described particular embodiments of the invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention, and, therefore, it is aimed to cover all such changes and modifications as fall within the true spirit and scope of the invention.

lclaim:

l. A transmission means intermediate an electric motive means and a diaphragm pump comprising a driven flywheel with a concentric recess .at its forward end, a cam surface secured in said recess, a reciprocating rod with one end riding on the face of said cam surface and the other end operatively connected with the diaphragm pump, and a cup shaped hous-' ing mounted over an end of the electric motive means with the bottom of said housing spaced from said electric motive means and provided with a centrally located opening through which the axle of the electric motive means projects.

2. The transmission means of claim 1 wherein the flywheel has an annular recess at its rear side and bearing means is located therein to effect journalling between said flywheel and the outer surface of the bottom of said cup shaped housing.

3. A transmission means intermediate an electric motive means and a diaphragm pump, comprising a cylindrical flywheel mounted on the axle of the electric motive means, a concentric recess at the forward surface of said flywheel, a cam surface means mounted in said recess on the forward surface of said flywheel, said cam surface: means riding on one end of a reciprocating rod means operating the diaphragm pump, a first cup shaped housing mounted over an end of said electric motive means, with the bottom of said housing spaced from the electric motive means and provided with a centrally located opening through which the axle of the electric motive means projects, a second cup shaped housing encompassing said flywheel and mounted so that the open end thereof is closed by the bottom of said first cup shaped housing, and an annular recess at the rear surface of said flywheel with bearing means located therein to effect journalling between said flywheel and the outer surface of said first cup shaped housing.

end wall of the housing 3 as 

1. A transmission means intermediate an electric motive means and a diaphragm pump comprising a driven flywheel with a concentric recess at its forward end, a cam surface secured in said recess, a reciprocating rod with one end riding on the face of said cam surface and the other end operatively connected with the diaphragm pump, and a cup shaped housing mounted over an end of the electric motive means with the bottom of said housing spaced from said electric motive means and provided with a centrally located opening through which the axle of the electric motive means projects.
 2. The transmission means of claim 1 wherein the flywheel has an annular recess at its rear side and bearing means is located therein to effect journalling between said flywheel and the outer surface of the bottom of said cup shaped housing.
 3. A transmission means intermediate an electric motive means and a diaphragm pump, comprising a cylindrical flywheel mounted on the axle of the electRic motive means, a concentric recess at the forward surface of said flywheel, a cam surface means mounted in said recess on the forward surface of said flywheel, said cam surface means riding on one end of a reciprocating rod means operating the diaphragm pump, a first cup shaped housing mounted over an end of said electric motive means, with the bottom of said housing spaced from the electric motive means and provided with a centrally located opening through which the axle of the electric motive means projects, a second cup shaped housing encompassing said flywheel and mounted so that the open end thereof is closed by the bottom of said first cup shaped housing, and an annular recess at the rear surface of said flywheel with bearing means located therein to effect journalling between said flywheel and the outer surface of said first cup shaped housing. 